Effect of Depth on the Growth and Carrageenan Content of Seaweed Kappaphycus alvarezii Cultivated Using Verticulture MethodPetrus Rani Pong-Masak and Nelly Hidayanti SariraE3S Web Conf., 147 (2020) 01011DOI: https://doi.org/10.1051/e3sconf/202014701011